Road marker antenna



FIG. 1 is a perspective view of a road marker antenna showing a top and front side thereof;

FIG. 2 is a front view of the antenna;

FIG. 3 is rear view of the antenna;

FIG. 4 is a left side view of the antenna;

FIG. 5 is a right side view of the antenna;

FIG. 6 is a top view of the antenna; and,

FIG. 7 is a bottom side view of the antenna. 

CLAIM I claim the ornamental design for a road marker antenna, as shown and described. 